Local
- Agacons Construction Inc.
- Astec Power Philippines, Inc.
- Batangas Sugar Central, Inc.
- Biscom, Inc.
- Busco Sugar Milling Company, Inc.
- Capiz Sugar Central, Inc.
- Cathay Pacific Steel Corporation
- Cebu Pacific Air
- Central Azucarera de la Carlota, Inc. – Roxas Holding Group of Companies
- Central Azucarera de Tarlac, Inc.
- Central Azucarera Don Pedro, Inc.
- Concrete Aggregates Corporation
- ProGreen Agricorp. Inc.
- Cotabato Sugar Central Co., Inc.
- Crystal Sugar Company, Inc.
- Davao Sugar Central Company, Inc.
- DyZum Distillery, Inc.
- ETSI Technologies, Inc.
- First Farmers Holding Corporation
- Fluor Daniel, Inc. - Philippines
- Ford Motor Company Phils., Inc.
- Hawaiian Philippine Company, Inc.
- Holcim Philippines
- Honda Philippines, Inc.
- Honda Cars Philippines, Inc.
- Isuzu Philippines
- La Tondeña Distillers, Inc.
- Lepanto Consolidated Mining Company
- Lopez Sugar Central Milling Company, Inc.
- Manila Electric Company (MERALCO)
- Mitsubishi Motors Philippines Corporation
- Mobil Philippines Incorporated
- National Irrigation Administration (NIA)
- Nikfill Construction Company, Incorporated
- Nissan Motors Philippines, Inc.
- Orientchem Incorporated
- Petron Corporation
- Philippine Airlines (PAL)
- PHINMA Group of Companies
- Procter & Gamble Philippines, Inc.
- R. Dan Co. & Inc.
- Republic-Asahi Glass Corporation
- Republic Cement Corporation
- San Miguel Corporation
- Sankyo Seiki (Philippines) Manufacturing Corporation
- Solid Cement Corporation
- Sweet Crystals Integrated Sugar Mills Corporation
- Taikisha Philippines Inc.
- Technoserve Construction Company, Inc.
- The Church of Jesus Christ of Latter Day Saints
- Toyota Motor Philippines, Corporation
- Trust International Paper Corporation (TIPCO)
- Tyco Integrated Systems Philippines, Inc.
- Universal Motors Corporation
- Universal Robina Corporation GROUP OF COMPANIES- Sugar Renewables (SURE)
Foreign
- AIRGASCO PTY LTD (Australia) – Engineering/System Design and Development, Manufacturing Supports and Site Diagnosis and Problem Solving with regards to Aerodynamics (internal systems), Acoustics (related to fans), Rotor Dynamics, Gas Cleaning/Dust Extraction and Mine Ventilation.
- ASIA PACIFIC ENGINEERING & CONSTRUCTION SERVICES (American Samoa) – General Building Contractor and General Engineering Contractor.
- CHIYODA CORPORATION (Japan) – Project & Program Management, Feasibility Studies, FEED, Engineering, Procurement, Construction, Commissioning, O & M Asset Management.
- DAIFUKU CO., LTD. (Japan) – Consulting, Engineering, Design, Manufacture, Installation, and After-Sales Services for Logistics Systems and Material Handling Equipment.
- DURR SYSTEM GmbH (Germany) – Aircraft Assembly, Application Technology, Assembly and Testing Systems, Balancing and Diagnostic Systems, Cleaning and Filtrating Systems, consulting and Planning, Production Software, Environmental and Energy Systems, Filling and automation, Final assembly and Conveyor Technology, Paint System, Technology and Industry Park.
- FIVES CAIL (FRANCE) / FIVES FLETCHER LTD. (U.K.) – Designers and Suppliers of Sugar Processing Equipment
- FIVES KCP (INDIA) – Designers and Suppliers of Sugar Processing Equipment and Boiler
- HWA JANN ENTERPRISE CO., LTD. (China) – Designer and Manufacturer of Auxiliary Equipment for Power Station, Material Conveying System and Fly Ash Conveying Processing System including Structures, Ash Removing and Ash Storage Control Panel, Electric Control Cabinet and Computer Control System.
- M-TEC CO., LTD (Japan) – Designer, Developer, Producer, and Assembler of Automotive Engine, Parts and Components for Honda Cars and Motorcycle.
- ORGANO (ASIA) SDN BHD (Malaysia) – System Design for Pure Water (Ultra Pure, Power Station, and Pharmaceutical) and for Waste Water (Industrial, Biological and Sludge).
- PARKER ENGINEERING CO., LTD. (Japan) – Manufacturer of Antirust for Metal-Surface Treatment; Various Types of Barrier Filter of Paint; Scrubbers; Industrial Ovens and General Heat Process Equipment; Heat Exchanger; Various Types of Antipollution Devices for Aerial Pollution, Waste Water, Ambient Noise, etc., and other Industrial Machinery. Undertaking Design and Execution of Construction Work, Electrical Work, and Painting Work, including Installation Work of Chemical Machinery/Equipment for Metal-Surface Treatment, Coating, etc.
- PRAJ INDUSTRIES LTD. (India) – Provide solutions in Bio-Ethanol, Alcohol, Brewery Plants, Process quipment, and Water and Wastewater Treatment Systems.
- TAIKISHA LTD. (Japan) – Provide Engineering Solutions for Automobile and Automotive Parts Industries; Electrical and Electronic Devices/Precision Machinery Industries; Pharmaceutical, Biotechnology and Food Industries; Aerospace Industry; Chemical and Film Industries; Machinery Industry; Printing, Publishing and Paper Industries, and Textile Industry.
- TATE & LYLE PROCESS TECHNOLOGY (U.K.) – Services of Consultancy and Project Management with regards to technical solutions oN Mining Operations, Factory Operations, Sugar Refining Process and Liquid Sugar Process with speciality products on Speciality Equipment, Control Systems, Speciality Chemicals, and SUMA.
- THERMAX LTD – Designers and Suppliers of Sugar Processing Equipment and Boiler.
- VOITH PAPER (Germany) – Provide Fiber and Environmental Solutions, Machines and Plants, Automation, Fabric and Roll System.